Fadell, who was enemies with Forstall during his time at Apple, wasn't sad to see him go

It's no secret that many Apple executives and employees celebrated Scott Forstall's recent departure, but there's one former Apple exec that is especially glad to see him go: Tony Fadell.

Tony Fadell was a huge deal during his days at Apple. He's called the "father of the iPod" because of his work on 18 generations of the device, and even took part in the hardware design of the first iPhone.

However, during his time at Apple, Fadell often went head-to-head with Forstall, the former Vice President of iOS Software. The two constantly fought over attention, credit, and resources, creating an "explosive" environment within the Cupertino headquarters' walls.

Forstall and Fadell were known enemies, and Fadell finally quit the company in 2010 to take on his own pursuits outside of Apple.

So how does Fadell feel about Forstall getting the boot?

"Scott got what he deserved," said Fadell. "I think what happened just a few weeks back was deserved and justified and it happened. If you read some of the reports, people were cheering in Cupertino when that event happened.

"So, I think Apple is in a great space, it has great products and there are amazing people at the company, and those people actually have a chance to have a firm footing now and continue the legacy Steve [Jobs] left."

Forstall was fired last month after working for the company for 15 years. His departure was largely due to the launch of Apple's new maps application, which turned out to be a nightmare. Apple ditched Google Maps as its main iOS maps app in favor of its own in-house maps service once iOS 6 released in September, but when it launched, there were huge issues with the geography and navigation. Apple CEO Tim Cook was even forced to apologize to customers for the disaster.

But Forstall refused to apologize, and continued butting heads with other Apple executives. In late October, Apple finally showed him the door. As Fadell mentioned, many Apple execs and employees cheered his exit.

While Fadell left a great legacy at Apple and clearly still has opinions about its affairs (he was saddened by the loss of the click wheel on the iPod), he has moved on to his own venture: Nest.

Nest is a smart thermostat start-up that was launched by Fadell in 2010 after his exit from Apple. He said he had been studying eco-friendly devices and came up with the Nest thermostat for efficient heating and cooling.

In classic Apple-like fashion, the Nest thermostat has a clean design and can be controlled remotely with a smartphone. It even learns about its environment.